
St Stephens Flat Roof Leak Detection
Don’t let a leaking flat roof ruin your property
Contact us today to schedule an inspection and make sure your roof is in good condition
- Non Destructive Solution
- Accurately pinpoint your leak
- 99% Success Rate
- Prevents further damage to your property
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Premier Leak Detection and Roof Membrane Integrity Testing
We are committed to helping UK facilities managers and commercial property owners maintain leak-free, compliant roofs. Our focus on Green Roof Membrane Integrity Testing and Commercial Flat Roof Leak Detection ensures your roof's durability and adherence to industry standards.
Our Specialised Roofing Services
Green Roof Membrane Integrity Testing
Green roofs demand specialised attention when being installed to prevent leaks in the future and to maintain their benefits. Our Green Roof Membrane Integrity Testing service ensures:
- Independent Membrane Integrity Testing: Your roof will be thoroughly surveyed, with a detailed inspection of all roof penetrations. This assessment will include evaluating roof terminations, rooftop equipment mounts, the roof membrane condition, perimeter flashing, parapet wall coping, and any other elements that could affect the membrane's watertightness.
- Regulatory Compliance: Meeting the requirements of British Standards 6229:2018, NHBC Chapter 7.1. and Premier Guarantee Structural Warranties requirements
Commercial Flat Roof Leak Detection
Flat roofs are vulnerable to leaks that can lead to significant damage. Our Commercial Flat Roof Leak Detection service offers:
- Precision Detection: Employing infrared thermography and electronic methods for accurate leak identification.
- Minimal Business Interruption: Non-invasive techniques to ensure your operations remain uninterrupted.
- Cost-Effective Maintenance: Regular checks to identify and address leaks before they cause extensive damage.
Why Work With Us?
- Independent Expertise: As a third-party service provider, we deliver unbiased assessments, essential for Premier Guarantee Structural Warranties.
- Highly Skilled Team: Our experts are proficient in the latest roof membrane integrity testing and roof leak detection technologies and methods.
- Standards Compliance:
We ensure that your roofing complies with British Standards 6229:2018, NHBC Chapter 7.1. and Premier Guarantee Structural Warranties requirements
The Importance Of Identifying Flat Roof Leaks Quickly
A flat roof is an important part of your building as it protects the structure and contents. Flat roofs can be more vulnerable to leaks that sloped roofs, and if they aren’t addressed quickly, a small leak can very quickly grow into a serious problem. With a leak, your flat roof may allow water to enter your home through multiple points, this can seriously damage your property and the contents. Our roof inspection experts can help identify the source of leakage quickly, preventing any serious damage to your property and its contents, avoiding costly repairs and replacements.
Flat roofs are susceptible to leaks because of a number of factors, including inadequate installation, poor maintenance, and being exposed to severe weather. Flat roof leaks are caused by many factors such as cracked flashings, blocked gutters and punctures from fallen objects.
It is important to remember that not every roof leak is obvious, without the specialist tools and experience of an roof leak detection specialist, some leaks may be difficult to identify. Regular professional roof inspections can maintain the integrity of your roof and help to detect any potential problems before they become major ones.
Our team provides both residential and commercial roof cleaning and roof maintenance services in St Stephens and throughout the Hertfordshire area, including St Julians, St Albans, Sopwell, Park Street, How Wood.
Are you the owner of a flat-roofed building that leaks?

Electronic Flat-Roof Leak Detection Specialists
We are an independent UK flat-roof leak detection company, with expertise in third party leak detection and integrity tests for all types of flat roofs and structural waterproofing membranes.
Our roof technicians based in St Stephens can inspect all types of flat roof throughout the Hertfordshire areas, both residential and commercial. They will quickly and accurately locate the entry point using non-destructive flat roof electronic leak detection techniques such as low voltage earth leakage testing, high voltage dielectric electronic integrity testing, differential pressure vacuum testing, thermal imaging and drone surveying. We can conduct leak detection tests and surveys in any weather condition. After your flat-roof survey is completed, you will receive a complete Health and Safety Plan and Risk assessments, as well as Method Statements. These together make up an extensive O&M Manual.

Integrity Testing For New Flat, Green And Blue Roofs
New flat, green and blue roofs must adhere to NHBC Chapter 7.1 Flat Roofs, Terraces and Balconies, as well British Standard 6229: 2018, (Flat Roofs with Continuously Supported Flexible Weatherproof Coverings, Code Of Practice).
Before a roofing membrane is overlaid it should be visually examined and electronically tested for waterproofing integrity. Any potential flaws in the membrane must be corrected and then the membrane should be retested before being overlaid, in accordance with NHBC Chapter 7.1.9 (Green Roofs & Propriety Roofs).
Premier Guarantee Structural Warranties extend this a step further. The waterproof membrane must be checked for integrity before applying any other components, as per section 7.11.15.2 under “Roof Coverings –Green Roofing” section 7.111.11. Testing should be performed only by an outside party that is not involved in the roofing contract.
All roof penetrations will be inspected and the roof surveyed. This will include an inspection of any roof penetrations, terminations, mounts for equipment, roof membrane conditions, parapet wall coping and perimeter flashing.
{While vacuum testing membrane seams off-site can be a great way to assess quality, it is not recommended for proving flat roof integrity.|Vacuum testing of seams of membranes done off-site is an excellent way to determine quality but it is not recommended to be used to verify the integrity of flat roofs.|Although it can be useful to test the quality of seams off-site, it is not recommended as a method to prove flat roof integrity.|While it’s a good way of evaluating quality, vacuum testing membrane seams is not recommended to prove flat roofs’ integrity.
We know every job is unique, and we have the experience and training to handle all types of roofs and customer needs. All our roof surveys follow the requirements of all major UK warranty providers as well as British Standards, The Property Care Association, and CIRIA.
If you have further questions about our St Stephens flat roof leak detection services get in touch today to get a free quote.

It Is Vital To Detect A Leak Quickly For Property Protection.
- Preventing Structural Damage - Water leaks can damage your building’s structural integrity if they aren’t addressed promptly. This could cause costly repairs, or worse, your building may collapse. Early leak detection will help preserve your building’s structural integrity, and help avoid larger damage.
- Avoiding Mold And Mildew - Roof leaks can lead to the growth of mildew and mould, which can have a negative impact on the health and well-being of the building’s occupants. By detecting roof leaks early, you can help keep your building safe by stopping the spread of mildew and mould.
- Repair Costs Can Be Reduced - The longer roof leaks go unnoticed, the more damage that they cause. This will require more expensive and complicated repairs than if it was discovered sooner. It is possible to reduce damage and repair costs by quickly identifying leaks.
- Save On Energy Costs - A roof leak can cause draughts and make it harder to keep your building at a comfortable temperature, which can increase your energy costs. You can save energy by identifying roof leaks early.
- Reduce Insurance Costs - If your building has a history of water damage, your insurance company may charge you higher premiums. By finding and fixing any leaks as soon as possible, you can avoid serious damage and lower your insurance premiums.
Reduce Your Insurance Costs If your building has a history of water damage, your insurance company may charge you higher premiums. By finding and fixing any leaks as soon as possible, you can avoid serious damage and lower your insurance premiums.
Flat Roof Leaks: The Signs To Look For
- Water stains on the ceiling are one of the most evident indicators of a flat roof leak. These stains may appear as discoloured patches or water droplets and can indicate a leaking roof. It is important to have a professional roof inspection done in order to determine the actual cause of water spots on your ceiling as water stains can be caused due to other reasons, such as plumbing leaks.
- A flat roof leak may be indicated by signs such as peeling wallpaper and paint. The wallpaper or paint may start peeling off the walls when water seeps into the attic and through the ceiling. This can also be caused by high humidity or condensation, so it is important to have a professional inspect the roof to ensure there are no leaks.
- Mouldy or musty odours could also indicate that you have a leaking roof. A leaky roof can promote the growth of mold or mildew and cause a musty odour. This could be a health hazard and should be corrected immediately.
- Condensation in the roof is another sign that there is a roof leak. If the temperature inside the building is higher that the outside, condensation can form on the roof surface. This signals a leak. It could also be caused by poor insulation or inadequate ventilation.
Keep in mind that these symptoms could also be caused by other problems. To determine the exact cause, a professional roof inspection may be necessary.
If you have further questions about our St Stephens flat roof leak detection services get in touch today to get a free quote.
Flat Roof Leak Detection FAQs
Why put gravel on a flat roof?
Gravel and pea shingle have two primary purposes on a flat roof; they provide a 'loading coat' and they afford UV protection. As ballast, the gravel will help anchor the material underneath and lower the risk of it being blown off in high winds.
Does walking on a flat roof damage it?
Flat Roofs A flat roof is less precarious than a pitched one, but you still run the risk of damaging the felt and potentially going through the membrane. You're less likely to cause damage on a warm day, and it's generally advisable to lay boards across it to walk on.
What do roofers use on flat roofs?
The most common ones include EPDM rubber, single-ply (TPO, PVC), modified bitumen, built-up roofs (BUR), and spray polyurethane foam. Many homeowners choose either EPDM or TPO. EPDM roofs are affordable and can reach a lifespan of 30+ years.
What is the most common defect in flat roof?
Leaks. Leaks are an all-too-common occurrence in buildings with flat roofs. This is mostly because flat roofs tend to lose their ability to effectively shed water if not properly maintained. Once moisture is unable to drain from the roof, it's just a matter of time before it finds its way into the building.
Should a flat roof hold any water?
Whilst brief and occasional ponding is acceptable on a flat roof, regular or long-lasting ponding could be an indication that there is an issue with the roof that needs to be addressed.
Other areas near St Stephens we cover include: